Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab7391 |
Spatial heterogeneity in CO2, CH4, and energy fluxes: insights from airborne eddy covariance measurements over the Mid-Atlantic region | |
Hannun, Reem A.1,2; Wolfe, Glenn M.1,2; Kawa, S. Randy1; Hanisco, Thomas F.1; Newman, Paul A.1; Alfieri, Joseph G.; Barrick, John4; Clark, Kenneth L.5; DiGangi, Joshua P.4; Diskin, Glenn S.4; King, John6; Kustas, William P.3; Mitra, Bhaskar7; Noormets, Asko7; Nowak, John B.4; Thornhill, K. Lee4; Vargas, Rodrigo8 | |
2020-03-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The exchange of carbon between the Earth's atmosphere and biosphere influences the atmospheric abundances of carbon dioxide (CO2) and methane (CH4). Airborne eddy covariance (EC) can quantify surface-atmosphere exchange from landscape-to-regional scales, offering a unique perspective on carbon cycle dynamics. We use extensive airborne measurements to quantify fluxes of sensible heat, latent heat, CO2, and CH4 across multiple ecosystems in the Mid-Atlantic region during September 2016 and May 2017. In conjunction with footprint analysis and land cover information, we use the airborne dataset to explore the effects of landscape heterogeneity on measured fluxes. Our results demonstrate large variability in CO2 uptake over mixed agricultural and forested sites, with fluxes ranging from -3.4 0.7 to -11.5 1.6 mu mol m(-2) s(-1) for croplands and -9.1 1.5 to -22.7 3.2 mu mol m(-2) s(-1) for forests. We also report substantial CH4 emissions of 32.3 17.0 to 76.1 29.4 nmol m(-2) s(-1) from a brackish herbaceous wetland and 58.4 12.0 to 181.2 36.8 nmol m(-2) s(-1) from a freshwater forested wetland. Comparison of ecosystem-specific aircraft observations with measurements from EC flux towers along the flight path demonstrate that towers capture similar to 30%-75% of the regional variability in ecosystem fluxes. Diel patterns measured at the tower sites suggest that peak, midday flux measurements from aircraft accurately predict net daily CO2 exchange. We discuss next steps in applying airborne observations to evaluate bottom-up flux models and improve understanding of the biophysical processes that drive carbon exchange from landscape-to-regional scales. |
英文关键词 | airborne eddy covariance CO2 and CH4 fluxes biosphere-atmosphere exchange |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521170500001 |
WOS关键词 | CARBON-DIOXIDE ; METHANE EMISSIONS ; TERRESTRIAL BIOSPHERE ; FOOTPRINT PREDICTION ; ATMOSPHERIC METHANE ; SURFACE CARBON ; BOUNDARY-LAYER ; WATER-VAPOR ; AIRCRAFT ; TOWER |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279198 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Atmospher Chem & Dynam Lab, Greenbelt, MD 20771 USA; 2.Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA; 3.ARS, USDA, Hydrol & Remote Sensing Lab, Beltsville, MD USA; 4.NASA, Langley Res Ctr, Hampton, VA 23665 USA; 5.USDA Forest Serv, Northern Res Stn, Silas Little Expt Forest, New Lisbon, NJ USA; 6.North Carolina State Univ, Dept Forestry & Environm Resources, Raleigh, NC 27695 USA; 7.Texas A&M Univ, Dept Ecosyst Sci & Management, College Stn, TX USA; 8.Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19717 USA |
推荐引用方式 GB/T 7714 | Hannun, Reem A.,Wolfe, Glenn M.,Kawa, S. Randy,et al. Spatial heterogeneity in CO2, CH4, and energy fluxes: insights from airborne eddy covariance measurements over the Mid-Atlantic region[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(3). |
APA | Hannun, Reem A..,Wolfe, Glenn M..,Kawa, S. Randy.,Hanisco, Thomas F..,Newman, Paul A..,...&Vargas, Rodrigo.(2020).Spatial heterogeneity in CO2, CH4, and energy fluxes: insights from airborne eddy covariance measurements over the Mid-Atlantic region.ENVIRONMENTAL RESEARCH LETTERS,15(3). |
MLA | Hannun, Reem A.,et al."Spatial heterogeneity in CO2, CH4, and energy fluxes: insights from airborne eddy covariance measurements over the Mid-Atlantic region".ENVIRONMENTAL RESEARCH LETTERS 15.3(2020). |
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